The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 2002
Filed:
May. 25, 1999
Applicant:
Inventor:
Elango Pakriswamy, Santa Clara, CA (US);
Assignee:
STMicroelectronics, Inc., Carrollton, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 5/00 ;
U.S. Cl.
CPC ...
H03L 5/00 ;
Abstract
A circuit includes a differential amplifier that generates a differential offset signal on its output terminals. The circuit also includes an offset compensator that has input terminals respectively coupled to the amplifier output terminals and a compensation terminal coupled to the differential amplifier. The compensator maintains the differential offset signal at a predetermined value, for example 0 V. When used in an integrated read-head preamplifier, such a circuit compensates for the nonzero head bias voltage, i.e., the preamplifier input offset voltage, without using a component that is external to the integrated preamplifier circuit.